According to the Star Trek: The Next Generation USS Enterprise NCC-1701-D Blueprints, the door in Jean-Luc Picard's ready room led to a bathroom. The blueprints also referred to the bathrooms as both "toilets" and "heads".

The main bridge of the USS Enterprise-D featured a bathroom just off the doors leading to the observation lounge. In the authorized re-creation of the main bridge in Star Trek: The Experience at the Las Vegas Hilton, the inscription on the doors read "HEAD". The head was visible in a few episodes, but while the doorway was initially labelled CONFERENCE in "Gambit, Part II", it was relabelled HEAD by "Emergence". In addition, in episodes throughout the seventh season, multiple crew members can be seen simultaneously entering the bridge via the head. It is unclear how many toilets are available for use in the head on the main bridge.